Car-wrench.



H.L.PLA0K.

GAR WRENCH. APPLICATION FILED SEPT. 29, 1913.-

Patented Apr. 14, 1914.

LANOGRAPH CO-, WASHINGTON. D. c.

HARRY L. FLACK, or DAYTON, OHIO.

CAR-WRENCH.

Specification of Letters Patent.

Application filed September 29, 1913.

Patented Apr. 1 1, 1914.

Serial No. 792,381.

To all whom it may concern:

Be it known that I, HARRY L. FLAoK, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Carrenches, of which the following is a specification, reference being had herein to the accompanying drawing.

This invention relates to car wrenches of that type designed for operating the winding drums or other devices which control the doors of dumping cars.

The object of the invention is to provide a wrench of this kind which will be so constructed that it can be readily adjusted to accommodate it to shaft ends or nuts of different sizes, this adjustment being accomplished without the use of tools of any kind and the movable part or dog of the wrench being held in its adjusted position by gravity during the manipulation thereof, and this adjustment being accomplished without weakening or complicating the construction of the wrench in an objectionable manner.

In the accompanying drawings, Figure 1 is a perspective view of a car wrench embodying my invention; Fig. 2 is a side elevation of the same showing the movable jaw adjusted to a different position from that shown in Fig. 1.

In these drawings I have illustrated one embodiment of the invention and have shown the same as comprising a body portion or shank 1, the rear portion of which is preferably hollow to receive a handle 2 by means of which the wrench is operated and the forward portion of which is provided with a jaw face 3. This jaw face extends upwardly and forwardly at an acute angle to the length of the shank and is preferably straight to engage the fiat side of the squared end of the windingshaft. Extending downwardly and forwardly from the shank is a second jaw face 4 adapted to engage that side of the squared end of the winding shaft adjacent to the side engaged by the face of the jaw 3 and tending to position the Wrench on the end of the squared shaft and retain the same thereon during its manipulation. The body portion or shank of the wrench is provided with an upwardly ex tending head which is preferably divided into two parallel portions 5 spaced apart to receive between them the end of a dog 6 which is provided with a downwardly extending portion 7 having a jaw face 8 arranged to extend parallel with the jaw face 3, when in operative position, and to cooperate therewith in the actuation of the part to be rotated. The dog is pivotally mounted upon the body portion of the wrench and in order that it may be adjusted with relation to the jaw 3 I have provided the two portions 5 of the body of the wrench each with a series of recesses 9 formed in the lower edge of a longitudinal slot 10. Each recess extends upwardly and rearwardly with re lation to the length of the shank and is open at its upper end. The dog 6 is provided on each side with a trunnion 11 adapted to move through the slot 10 and to enter any one of the bearing recesses 9 in the adjacent portion 5 of the body of the wrench. Consequently, the point of connection between the pivoted dog and the body portion of the wrench can be quickly and easily adjusted by merely moving the rear end of the dog upward and shifting the trunnions from one pair of recesses to the other. As soon as the dog is released the trunnions will position themselves by gravity and will be retained in their recesses during all normal manipulation of the wrench. It will be noted that the recesses extend at a broad angle to the plane of the jaw face 3 and, consequently, that the pull upon the trunnions when positioned in these recesses is at substantially right angles to the plane of said jaw face and further that the'arrangement is such that there is a large body of metal to receive the strain when the trunnions are in any pair of recesses.

While I have shown and described one embodiment of my invention it will hennderstood that this has been chosen for the purposes of illustration only and that I do not desire to be limited to the details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

A car wrench comprising a shank having a jaw face at one end thereof, said jaw face extending upwardly and forwardly at an acute angle to the length of said shank, said shank also having a lip extending downwardly and forwardly from the lower edge of the first-mentioned jaw face, said shank further having two upwardly extending parallel portions having longitudinal slots arranged above the horizontal plane of said shank and each provided at its lower edge with a plurality of upwardly and rearwardly extending bearing recesses, a dog extending between the two portions of said shank and having oppositely extending trunnions to enter the'respective recesses, and each adapted to enter different recesses, said dog having a downwardly and forwardly extending portion provided at its low-er end with a head having a jaw face arranged at substantially right angles to said dog and adapted to extend parallel with the jaw face of said shank when in its operative position whereby said dog may be adjusted to cause the cooperating parts of said dog and said shank to form a substantially rectangular socket of any one of a plurality of sizes.

In testimony whereof, I affix my signature in presence of two witnesses.

HARRY L. FLAOK. Witnesses:

F. W. SGHAEFER, H. L. HAMMAKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

